Eight days after returning from a trip to the Middle East, a 68-year-old South Korean man developed a cough and fever. He visited four health facilities seeking treatment and inadvertently triggered the biggest outbreak of Middle East Respiratory Syndrome (MERS) outside of Saudi Arabia.

This graphic lays out the complex connections of the initial outbreak in an easy to digest visualisation. The data was compiled by piecing together press releases and situation updates by the Korean Ministry of Health and the WHO.